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Table 5 Percent lavagable vs non-lavagable TiO2 in the lung

From: Pulmonary response to intratracheal instillation of ultrafine versus fine titanium dioxide: role of particle surface area

Particle 7 Days post 42 Days post
UFTiO2 19% lavagable 0% lavagable
  81% non-lavagable 100% non-lavagable
FTiO2 91% lavagable 84% lavagable
  9% non-lavagable 16% non- lavagable
  1. Values are for medium dose exposures (0.52 mg/rat vs 10.7 mg/rat for UFTiO2 and FTiO2, respectively, i.e., a surface area dose of 0.06 cm2 particles/cm2 alveolar epithelial surface).